WebSVN – HelenOS – Diff – /kernel/trunk/arch/ia32/src/drivers/vesa.c


/*
 * Copyright (C) 2006-2006 Jakub Vana
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifdef CONFIG_FB
 
#include <genarch/fb/fb.h>
#include <arch/vesa.h>
#include <putchar.h>
#include <mm/page.h>
#include <mm/frame.h>
#include <mm/as.h>
#include <arch/mm/page.h>
#include <synch/spinlock.h>
#include <arch/types.h>
#include <arch/asm.h>
#include <memstr.h>
 
__u32 vesa_ph_addr;
__u16 vesa_width;
__u16 vesa_height;
__u16 vesa_bpp;
__u16 vesa_scanline;
 
 
int vesa_present(void)
{
    if(vesa_width!=0xffff) return true;
    if(vesa_height!=0xffff) return true;
    return false;
}
 
 
static __u32 log2(__u32 x)
{
    __u32 l=2;
    if(x<=PAGE_SIZE) return PAGE_WIDTH+1;
   
    x--;
    while(x>>=1) l++;
    return l;
}
 
void vesa_init(void)
{
    int a;
 
    __address videoram_lin_addr;
 
    videoram_lin_addr=PA2KA(PFN2ADDR(frame_alloc( log2(vesa_scanline*vesa_height) -FRAME_WIDTH,FRAME_KA)));
    /* Map videoram */
    for(a=0;a<((vesa_scanline*vesa_height+PAGE_SIZE-1)>>PAGE_WIDTH);a++)
    page_mapping_insert(AS_KERNEL, videoram_lin_addr+a*4096, vesa_ph_addr+a*4096, PAGE_NOT_CACHEABLE);
   
    fb_init( videoram_lin_addr,vesa_width,vesa_height,vesa_bpp,vesa_scanline);
 
}
 
#endif
 
 

Rev 1289	Rev 1292
1	/*	1	/*
2	* Copyright (C) 2006-2006 Jakub Vana	2	* Copyright (C) 2006-2006 Jakub Vana
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#ifdef CONFIG_FB	29	#ifdef CONFIG_FB
30		30
31	#include <genarch/fb/fb.h>	31	#include <genarch/fb/fb.h>
32	#include <arch/vesa.h>	32	#include <arch/vesa.h>
33	#include <putchar.h>	33	#include <putchar.h>
34	#include <mm/page.h>	34	#include <mm/page.h>
35	#include <mm/frame.h>	35	#include <mm/frame.h>
36	#include <mm/as.h>	36	#include <mm/as.h>
37	#include <arch/mm/page.h>	37	#include <arch/mm/page.h>
38	#include <synch/spinlock.h>	38	#include <synch/spinlock.h>
39	#include <arch/types.h>	39	#include <arch/types.h>
40	#include <arch/asm.h>	40	#include <arch/asm.h>
41	#include <memstr.h>	41	#include <memstr.h>
42		42
43	__u32 vesa_ph_addr;	43	__u32 vesa_ph_addr;
44	__u16 vesa_width;	44	__u16 vesa_width;
45	__u16 vesa_height;	45	__u16 vesa_height;
46	__u16 vesa_bpp;	46	__u16 vesa_bpp;
47	__u16 vesa_scanline;	47	__u16 vesa_scanline;
48		48
49		49
50	int vesa_present(void)	50	int vesa_present(void)
51	{	51	{
52	if(vesa_width!=0xffff) return true;	52	if(vesa_width!=0xffff) return true;
53	if(vesa_height!=0xffff) return true;	53	if(vesa_height!=0xffff) return true;
54	return false;	54	return false;
55	}	55	}
56		56
57		57
58	static __u32 log2(__u32 x)	58	static __u32 log2(__u32 x)
59	{	59	{
60	__u32 l=2;	60	__u32 l=2;
61	if(x<=PAGE_SIZE) return PAGE_WIDTH+1;	61	if(x<=PAGE_SIZE) return PAGE_WIDTH+1;
62		62
63	x--;	63	x--;
64	while(x>>=1) l++;	64	while(x>>=1) l++;
65	return l;	65	return l;
66	}	66	}
67		67
68	void vesa_init(void)	68	void vesa_init(void)
69	{	69	{
70	int a;	70	int a;
71		71
72	__address videoram_lin_addr;	72	__address videoram_lin_addr;
73		73
74	videoram_lin_addr=PA2KA(PFN2ADDR(frame_alloc( log2(vesa_scanline*vesa_height) -FRAME_WIDTH,FRAME_KA)));	74	videoram_lin_addr=PA2KA(PFN2ADDR(frame_alloc( log2(vesa_scanline*vesa_height) -FRAME_WIDTH,FRAME_KA)));
75	/* Map videoram */	75	/* Map videoram */
76	for(a=0;a<((vesa_scanline*vesa_height+PAGE_SIZE-1)>>PAGE_WIDTH);a++)	76	for(a=0;a<((vesa_scanline*vesa_height+PAGE_SIZE-1)>>PAGE_WIDTH);a++)
77	page_mapping_insert(AS_KERNEL, videoram_lin_addr+a4096, vesa_ph_addr+a4096, PAGE_NOT_CACHEABLE);	77	page_mapping_insert(AS_KERNEL, videoram_lin_addr+a4096, vesa_ph_addr+a4096, PAGE_NOT_CACHEABLE);
78		78
79	fb_init( videoram_lin_addr,vesa_width,vesa_height,vesa_bpp,vesa_scanline);	79	fb_init( videoram_lin_addr,vesa_width,vesa_height,vesa_bpp,vesa_scanline);
80	putchar('\n');	-
81	}	80	}
82		81
83	#endif	82	#endif
84		83
85		84

Subversion Repositories HelenOS

(root)/kernel/trunk/arch/ia32/src/drivers/vesa.c – Rev 1289 → 1292